Introduction: योऽष्टादशजपेन्नित्यं नरो निश्चलमानसः | ज्ञानसिद्धिं स लभते ततो याति परं पदम् || - वराहपुराणम्
Translated: When you recite the eighteen chapters of Bhagavadgita regularly, with a pure and unshaken mind, you attain the perfection in knowledge and reach the supreme goal - Varahapuranam
About first 8 selected verses: I selected these eight verses from Swami Dayanand's discourses in Arsha Vidya, Saylorsburg, PA.